Rail-sanding device.



W. V. TURNER.

HAIL SANDING DEVICE. APPLlcAnoN imn nov. 1. i911.

Y Lfg, Patentedv Man 1.8, 1919.;

INVENTOR WGITQPV. T

citizen of the United States,

srafrns rarnnr carica WALTER V. TURNER, 011' WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

RAIL-SAN DIN G DEVICE.

Specification of Letters Patent.

Patented Mar. 1s, 1919.

To all whom it may concern.'

Be it known that I, WALTER V. TURNER, a residing at Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented newv and useful Improvements in Rail-Sanding Devices, of which the following is a specification.

This invention relates to devices for controlling the sanding of the rails, and more particularly to a device adapted for cars employed in traction service.

The principal object of my invention is to provide an improved sand controlling device for double end equipments and adapted to effect the sanding of the rails only at the operating end of the car.

In the accompanying drawing, the single figure is a diagrammatic view, mainly in section, of a car brake and controlling equipment, showing my invention applied thereto.

According to the drawing, the equipment may comprise an emergency valve device 1, consisting of a casing having a piston chamber 2, connected to an emergency brake pipe 3, and containing piston 4, and having a valve chamber 5, containing a slide valve 6, and connected by passage 7 and pipe 8 to the main reservoir 9.

At each end of the car, there is provided an electric power controller 10, provided with a removable controller handle 11, and a double ybeat pilot valve 12 adapted to be operated upon release of the controller handle for venting fluid from the respective pipes 13 and 23.

For this purpose, a bell crank lever 14 may be provided, one arin of which is adapted to engage the stem of the pilot valve 12 and having the other arm in engagement with a spring pressed stem 15 which is normall prevented from pressing on the bell cran lever by depressing the controller handle 11. l

According to my invention, a double check valve device 16 is provided for controlling the supply of Huid under pressure to effect the sanding of the rails at either end of the car and comprises a casing having opposite piston chambers 17 and 18 containing the' respective pistons 19 and 20 connected by a stem 21 and adapted to operate a slide valve 22. v

The piston chamber 18 is connected by passage 24 to pipe 13 and piston chamber 17 is connected by passage 25 to pipe 23.

' In one position of the double check valve, a cavity 26 connects a fluid pressure supply passage 27 with a passage 28 leading to pipe 29, Which supplies fluid under pressure for Sandin the rails at one end of the car, and in anoter position of the check valve device, the cavity 26 connects passage 27 with a passage 30 and pipe 31 for supplying fluid 'for sanding the rails at the other end of' the car.

In order to supply fluid under pressure to the supply passage 27, when an application of the brakes is effected, the slide valve 6 of the emergency valve device is provided with a cavity 32 adapted in the application position 'of the slide valve to connect a passage 33 and pipe 34, leading to a sanding reservoir 35, with a passage 36 and pipe 37 connected to the supply passage 27.

The emergency valve device is also provided With a relay valve 38 for venting Huid from the emergency brake pipe `3 and piston lchamber 2, through passage 39 to exhaust port 40.

The chamber at the opposite side of the rrelay Valve 38 is connected by a passage 41 and pipe 42 to a passage 43 in the double check valve device 16, having branches opening into the piston chambers 17 and 18, when the corresponding pistons 19 and 20 are in their inner position.

In operation, at the nonoperating end of the car, Where the controller handle 11 has y been removed, the spring stop 15 depresses the bell crank lever 14 and the double beat pilot valve 12 is thereby maintained unseated in one direction, so that the pipe 23 is vented to an exaust port 44 and consequently the piston chamber 17.

vAt the operating'end of the car, when the controller handle is applied and depressed, the double beat pilot valve l2 is allowed to seat in the opposite direction, cutting off the exhaust from pipe 13 and permitting fluid to fiow thereto from the main reservoir pipe 8. The piston chamber 18 is thus supplied with fluid under pressure and the double check valve is shifted, so that passage 27 is connected to passage 28, through cavity 26.

In the release position of the emergency slide valve 6, a port 45 registers with passage 33, so that the sanding reservoir 35 is normally charged With fluid under pressure from valve chamber 5 and the main reservoir 9.

When the operator removes his hand from the controller handle 11, at the operating` end of the car, the double beat pilot valve 12 is operated by the bell crank lever 14 so as to vent fluid from pipe 13. This does not cause any movement of the double check valve, however, since the opposite piston 19 is also subject to atmospheric pressure, but through piston chamber 18, fluid is vented from passage 43, which is connected through pipe 42 and passage 41 to the top of relay valve 38.

The relay valve 38 is then operated by brake pipe pressure below the valve and the same opens to vent fluid from the brake pipe and piston chamber 2, so as to cause the piston 4 to operate and effect an application of the brakes, by supplying fluid from valve chamber 5 and the main reservoir through pipe 46 to brake cylinder 47 In the application position of slide valve 6, cavity 32 connects passages 33 and 36, so that fluid under pressure is supplied from the sanding reservoir 35 to pipe 37 and thence through passage27 and cavity 26 in the slide valve 22 to passage 2S and pipe 29, thus supplying fluid for sanding to one end of the car.

If the other end of the car is the operating end, fluid Will be supplied to pipe 23 when the controller handle is depressed, so that the piston 19 is shifted and cavity 26 in slide valve 22 connects supply passage 27 with passage 30, thus permitting fluid to be supplied to that end of the car uponoperating valve device to effect an application of the brakes.

Feed grooves 48 permit fluid to equalize from the corresponding piston chambers 17 and 18 to valve chamber 49 when one or the other of the pistons 19 and 20 is shifted to its inner position, so that the slide valve 22 is prevented from being lifted from its seat by pressure in thesanding reservoir 35 which acts on the under side of the valve.

A passage 50 connects passage 27 with valve chamber 4S) and contains a check valve 51, so that fluid is supplied to valve chamber 49 in an emergency application of the brakes,

at Which time the valve chamber pressure may not be sufficient to hold the' valve 22 on its seat..

The check valve 51 prevents back iioW from valve chamber 49 to thesupply passage 27 and consequently to sand passages 30 and 28, one of which is connected through cavity 26 to the passage 27.

Having now described my invention, what I claim as new ters Patent is 1. The combination with a controller handle and a pilot valve operated upon release of the controllerhandle for venting fluid to effect an application of the brakes, of a valve device controlled by the operation of said pilot valve for supplying fluid to effect sanding of the rails.

2. The combination with a controller handle and a pilot valve operated upon release of the controller handle for venting fluid to effect an application of .the brakes, of a valve device controlled by the operation of said pilot valve and having one position for supplying fluid to effect sanding of the rails at one end of the car and another position for supplying fluid to effect sanding at the other end of the car.

The combination With a controller handle and a pilot valve operated upon release of the controller handle for venting fluid to eect anapplication of the brakes, and adapted upon depressing the controller handle to supply fluid under pressure, of a valve device operated by fluid supplied from said pilot valve for controlling the sanding of the rails. y

4. The combination with a controller handle and a double beat valve operated upon releaseV of the controller handle for venting fluid from a pipe to effect an apadapted upon plication of the brakes and depressing the handle to supply fluid under pressure to said pipe, of a double piston device operated in one direction by fluid supplied from said pilot valve for establishing connection through which fluid is supplied to eEect the sanding of the rails at one end of the car.

In testimony whereof I have hereunto set my hand.

WALTER V. TURNER.

and desireto secure by Let- 

